Here's two new interviews! First is one that W Magazine had with Charlie Bewley:

Did you feel an obligation to play Demetri a certain way?
Well, as you go down the cast list, the characters are less scripted out, which is great for me because I don't think that Stephanie [Meyer] for one second imagined that Demitri would be as flamboyant as I play the character.

Do you lose your British accent for the movie?
I keep the British accent because I think the history of film tells us that if there's a bad guy from a foreign country, they're probably going to have a British accent.